A block of wood floats on water. A layer of oil is now poured on top of the water to a depth that more than covers the block. If 91% of the wood is submerged in water before the oil is added, find the fraction submerged when oil with a density of 883 kg/m3 covers the block. (Do not neglect the buoyant force of air before the oil is added.) I would just like help on getting started on this problem. I looked at the equation Vsub=Vs(p,s/p,f) but I wasn't sure how/what values to substitute if they are given as percentages. I tried setting up the equation as 0.91=p,s/p,f but I wasn't sure what I would be solving for/plugging in if I had done that.